Caio

Caio may refer to:

• Caio (name), a Portuguese given name derived from the Latin given name Gaius
• Caio, Carmarthenshire, a village in west Wales
• Caio (moth), a genus
• Italian destroyer Caio Duilio, a destroyer of the Italian Navy

• Caio Induscar (Brazil)

• Caius (disambiguation)
• Gaius